lizard

Q: Please explain the logic in this. A lizard fell on my mom, then my grandma told my mom to wash her head, then only can she perform Salah, otherwise it's not permissible, is that correct?

Q:

1. Today I found a lizard in the utensils cupboard and in trying to kill it, it hid inside the cupboard and traveled from one to another. I did not know where it went, so I took out all utensils. Still I did not find it. I washed all utensils of all the cupboards by pouring water once. It took around 3 to 4 hours in doing all the effort. I am not worried that if I place the utensils again and i find it again, do I have to wash all the utensils again? It was really so hectic. Is lizard najis?

2. A cockraoch ran over my leg in the washroom. I poured water over there three times. Had I become paak? I read in an islamic website that a cockraoch in the washroom is napaak. Is it true?

3. Last year a mouse used to come from Indian toilet and roam around the washroom. We somehow managed to get rid of them. But once a shirt piece of my suit fell down over the washroom floor place where it used to come every night. I washed it many times but I don't feel like wearing it as I feel that the mouse used to come from such a dirty place with traces of dirty water from the flush and my cloth fell down on the floor. Am I doing right by not wearing it?

Q: I have extreme fear of lizards. By the grace of Allah Ta'ala I am trying to overcome this by ignoring its presence. Is this fear a shirk and will I be forgiven?

Q: Is it a reward for killing a lizard in Islam?